@article{Thu Ha_Thai_Diep_Thu Thuy_Ky_Tam_2020, title={Chemical composition and antimicrobial activity of the essential oil from twigs and leaves of <i> Magnolia macclurei </i> (Dandy) Figlar from Ha Giang Province, Vietnam}, volume={42}, url={https://vjs.ac.vn/index.php/vjbio/article/view/13839}, DOI={10.15625/0866-7160/v42n1.13839}, abstractNote={&lt;p&gt;The chemical composition of the essential oil obtained by hydrodistillation of the twigs and leaves of &lt;em&gt;Magnolia macclurei&lt;/em&gt; collected in Hoang Su Phi, Ha Giang Province, Vietnam was analyzed using GC/MS. A total of 38 compounds were detected in essential oil, accounting for 94.49% of the oil, in which 37 compounds were identified accounting for 93.33%. &lt;em&gt;cis-&lt;/em&gt;β-Elemene (14,30%), bicyclogermacrene (18,57%), and 10-&lt;em&gt;epi&lt;/em&gt;-ᵧ-eudesmol (16,86%) were the main components of essential oil. The minor components present with rather high amount were: Germacrene D (2,12%), guaiol (8,52%), hinesol (2,34%), valerianol (6,76%), and bulnesol (2,93%). Antibiotic activity of the essential oil sample was tested against a Gram positive bacteria &lt;em&gt;Staphylococcus aureus&lt;/em&gt;, a Gram negative bacteria &lt;em&gt;Escherichia coli&lt;/em&gt;, and a yeast &lt;em&gt;Candida albican&lt;/em&gt;&lt;em&gt;s&lt;/em&gt; using an agar disk diffusion method. All three microorganisms tested are resistant to the oil from twigs and leaves of &lt;em&gt;M. macclurei&lt;/em&gt;. That is exhibited through the inhibitory zone diameters ranging from 4 to 12 mm.&lt;/p&gt;}, number={1}, journal={Academia Journal of Biology}, author={Thu Ha, Chu Thi and Thai, Tran Huy and Diep, Le Ngoc and Thu Thuy, Dinh Thi and Ky, Nguyen Duc and Tam, Ha Minh}, year={2020}, month={Mar.} }